Improvement in tuyeees



`@uitrit tatrs gsztrntifirr.

WILLIAM H. MYERS, OF BALTIMORE, MARYLAND, ASSIGNOR rlO SYLV ESTER IMATTHIAS, OF SAME PLAGE.

Laim Para No. 78,471, atea Jun@ 2, 186s. v

IMPROVEMENT IN TUYBRES.

To ALL wHoM 1r MAY coNcERN:

Be it known that I, WILLIAM H. MYERS, of Baltimore, inthe-county ofBaltimore, and State of Maryland, have invented a new and usefulImprovement in Tuyeres; and'Ido hereby declare the following to be afull, clear, and exact description of the same, reference being had tothe accompanying drawings, in which'- Figure 1 isa perspective view ofImy tuyere detached :from the forge.

Figure 2 is a vertical longitudinal section of the same in position.

My invention relates to that class of tuyeres which have an air-chamberbetween the nozzle ofthe bellows :1nd the orifice through which the airpasses into the re, and it consists in providing thc bed, upon which thecentre ot' the tire rests, with an open 'escape-pipe, through which dustand tine ashes may escape from the bottom ofthe .lire while the bellowsis in "operation, and through which a direct upward draught may pass tothe fire when the bellows has 'ceasedto operate. l o v l That others mayunderstand the nature and construction of my invention, I willfullydescribe it.

A is the cast-iron shell, forming the air-chamberof my tuyere. Thisair-chamber may be of any desired size, though I linow ofno particularadvantage to be derived from increasing its dimensions beyond what 1snecessary.

The air-chamber B has a neck or orifice at one side, for the admissionof' the nozzle of the bellows, and at.

the top of the shell A is the flange E, by which the said shell issustained in its position in thel bottom of the forge.

Across the top ofthe plate or fiange are the two ridges, F, with a smallila-t space between them, and the two slots C C, penetrating from theirinner slopes to the air-chamber B. These slots are the outlets for theair from the bellows. They are enlarged from their outer ends inward,and are inclined towards each other, as shown, so that currents of air,passing outward through them, would meet at a distance of four or fiveinchesiI These orifices C C. may bc. larger or smaller, according to'the quantity orsize of the re to be made, and, in practice, the partcontaining the ridges, F Il, I prefer to make separate from the plate E,and inserted therein, as shown in iig. 2, so that they can be made insets. with orices of different sizes, and may be interchanged wheneverit is desired. l

It has been found that with a tuyere constructed as above, and with noaddi-tional feature, the accumulation of dust and vashes at the point inthe immediate vicinity of theblastholes would, in a little time, becomea seriousinconvcnience.

By experiment I have discovered that, by-insertng an open pipe similarto that shown at D, I can almost, ii' not perfectly, obviatc and correctall of these diii'iculties. This pipe is flattened at its upper end, soas t0 present the form of a narrow slot, extending between the ridges FF, and parallel withthem, and nearly or quite as long as therslots O O.'From thence itdescends through the air-chambervl, and opens beneaththevforgc in some open space left for that'purpose.\

When I construct the part of the. as above described, I also make the pimade permanent and tight.

The operation ot this pipe will be readily'undcrstood.

While the bellows is in operation, the currents of air, passing outwardtbr against the pieces of fuel lying above them, and there willbe aslight `1eaction, of air downward through the pipe D,`and this How willbe suilieient to remove alwaysaccumulate at that point. When fresh fuelVis mixed with that which escape of gas through thesam'e duct, and thelikely to injure a piece f iron placedrin the fire to heat, ofthe fire,and gas generated above it would pass olf wit plate which contains theridges and orifices separate from the remainder, pe'D in two parts, sothat the joint at theupper end of said pipe may be ongh the orifices CC, impinge suliicient to cause a slight flow dust andline ashes,which'wrill is burning, there will also be an gas which so escapes isprecisely the portion'which would be most because the iron to be heated.is' placed neur the bottom hout doing injury. When the bellows ceases tooperate,-

then there is an upward current immediately established through the pipeD, because air can gain access to the "fire more readily through saidpipe than fromabove, through the eaked fuel.

By this arrangement I secure a better heat, amore compact re, acleaner-fire, and less inconvenience from dust and gas than can beattained by the use of any other tuyere with which I am acqnainted.

It is evident that the advantages of my open escape-ppe D may beobtained without adopting the wlioleof `the details of'constructionwhich I have shown and described, andhen'ce I shouldconsider anyescapewa'y having one end in communication with the fire, substantiallyin the manner described, and capable of conveying away the dust andlashes, while the bellows continues to operate, as above set forth, toembrace the principles et" my invention.

Having described my invention, what I claim as new, is-' l l Anescape-pipe D, or its equivalent, independent of the ductwhicb conveysthevbla'st tothe fire, descending from the centre of the tuyere, toconvey away ashes, dust, dic., from the bottom of the re, and to admit adirect draught when Athe bellows is not inl operation, substantially asset forth.

A tuyerc. constructed with the aircha`mbcr B, outlets C C, and theescape-pipe D, substantially as described.

i WM. H. MYERS.

Witnesses:

R. D.. O. SMITH,

Sp. MATHIAS.

